The Essential 55by Ron Clark

• Rule #8: Do not smack your lips, tsk, roll your eyes, or show disrespect with gestures.

• If I hear a tsk, your homework will be doubled.

* QUIZ

*Homework Questions

* Notes on Complementary & Supplementary Angles

Session 10 Quiz today

HW on your desk.

Thurs/Fri 3.6 & 3.7

Mon/Tues Review Ch 3

Wed/Thurs TEST CH 3 &

4.1* Practice

HW Questionsp. 108 11-23

p. 113 8-18, 20-27

Two angles are supplementary if the sum of their measures is 180 degrees. Each angle is the supplement of the other.

1 2

20160

These are supplements of each other because their angles add up to 180.

x

Example 1 Find the value of x.

x + = 18020

x = 160

20

x

Example 2 Find the value of x.

65

x + = 18065

x = 115

Example 3 Find the value of x.

(7x 10) 3x

(7x + 10) + 3x = 180 10x + 10 = 180

10x = 170

x = 17

Two angles are complementary if the sum of their measures is 90 degrees. Each angle is the complement of the other.

12

3060

These are complements of each other because their angles add up to be 90.

Example 4 Find the value of x.

x

15x + = 9015

x = 75

Example 5 Find the value of x.

(4x + 3)

(x - 8)

(4x + 3) + (x - 8) = 90

x = 19

5x - 5 = 905x = 95

12

3

5

Are angles 1 and 2 a linear pair?

Are angles 1 and 3 adjacent angles?

Are angles 2 and 3 adjacent angles?

Are angles 3 and 4 a linear pair?

no

no

yes

yes

Think back to last class…

4

12

3

5

Are angles 4 and 5 supplementary angles?

Are angles 2 and 3 complementary angles?

Are angles 2 and 1 complementary angles?

Are angles 4 and 3 supplementary angles?

no

no

yes

yes

Now, think of what we talked about today.

4

#1-3 1st figure, #4-7 2nd figure, #8-10 3rd figure

Figure 1

A

CF D

B

E

G

20

Figure 2

X

Z

Q

S

T

V

Y

4050

40

Figure 3

N

M

O

L

P

Q

R4545

20

p. 119

#14 – 26 even, 28 – 37 all

(16 problems total)

TEST Wednesday 14th(odd)

Thursday 15th (even)!!!